Air Theme Song, "Summertime"

February 25, 2015 5:52 PM

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Philly forever! Will Smith gave Ellen DeGeneres' studio audience a thrill when he whipped out his famous Fresh Prince of Bel-Air theme song for an amazing sing-along. The â€˜90s star had stopped by the daytime talk show to promote his upcoming film Focus.

"This is how you know if you got real fans in the house!" Smith, 46, said, before busting out the tune.